1. Department of Chemistry, College of Arts and Sciences, Kansas State University, Manhattan, Kansas 66506, United States
2. Russell H. Morgan Department of Radiology and Radiological Sciences, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
3. Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
4. Department of Pharmaceutical Sciences and Health Outcomes, The Ben and Maytee Fisch College of Pharmacy, The University of Texas at Tyler, Tyler, Texas 75799, United States